Finding a topographic map in the University of Texas at Arlington Library Floor 2 Collection

Finding a topographic map in the Government Documents Map Collection, University of Texas at Arlington Library
The topographic maps are filed in folders using two different classification number series.  The original series used the Superintendent of Documents classification number stem I 19.81: latitude/longitude number digits of the lower right corner of the map.  I 19.81: 32097 [...]